ES2243180T3 - POWDER VACUUM CLEANER. - Google Patents

Abstract

PCT No. PCT/EP94/03997 Sec. 371 Date Aug. 6, 1996 Sec. 102(e) Date Aug. 6, 1996 PCT Filed Dec. 1, 1994 PCT Pub. No. WO95/15108 PCT Pub. Date Jun. 8, 1995The invention pertains to a filter bag (8) for a vacuum cleaner (1), with a retainer plate (16) made of a cardboard-paper material that can be attached to a dust bag (37), for example by gluing, and that has a sealable opening (19) for a suction tube (vacuum connector (18)) of a vacuum cleaner (1), where the opening (19) can be closed off with a separate closure piece (V) which can be moved from an open position to a closure position, being slid between two tiers (38, 40). For greater ease of handling the invention proposes that the closure piece (V) be practically fully enclosed in an outer contour of the retainer plate (16) in the open position and in the closure position and that the closure piece (V) lie exposed in a recess (57) of the uppermost tier (38) separate from the opening (19), the longitudinal extension of the recess (57) conforming to the closure piece (V).

Description

Vacuum cleaner

The invention concerns a dust aspirator with a housing and a dust filter bag housed in it and presenting a retention plate (see document US-A-2 864 462), being formed in the housing a closing plate with a maneuvering projection for actuate a closing element of the retaining plate that closes an opening for the connection connection of a fitting in a channel air blower dust vacuum with filter bag for dust, the projection being formed in addition to which can flex elastically in the direction of its extension and said projection being tiltable as a whole.

For the proper cooperation of the vacuum cleaner powder with the dust filter bag, the invention proposes that the outgoing maneuver move, in the course of tilting, to closing projection with respect to the opening by cooperation of said maneuvering projection with a handling projection formed at one end of the closure element opposite the opening.

The opening of the dust filter bag in the area of the retention plate for a suction tube of a dust vacuum can be both open and closed by means of the closure element, the closure element of almost completely in the closed position and in the open position in an outer contour of the retention plate and the closure element being exposed in a recess of the uppermost layer separated from the opening, being adapted a longitudinal extension of the recess to a travel path of the closing element. It is also preferred that, in the case of al minus three layers of cardboard-paper material fixedly arranged on the retention plate, a layer forms a support for the closing element in the open position. The element closure is set to a size such that it is housed completely on the outer contour of the retention plate both in the closed position as in the open position. This is resolves, for example, by making the closure element possess a closing surface adapted to the opening of the retention plate and equipped with a handle arranged therein, whose closing surface is moved to the opening area of the retention plate to set the closing position. The tour of minimum displacement corresponds here to the diameter of the opening of the retention plate. To open a filter bag again dust closed by mistake, the closing element of such that the closing surface leaves the area of the opening of the retention plate at least to a degree such that can introduce the suction tube of the dust vacuum cleaner. He closure element size has been chosen here so that the displacement movements take place within the contour outside of the retention plate. In this case, a safe guiding of the closing element making, in the case of at minus three layers of cardboard-paper material fixedly arranged on the retention plate, a layer forms a substantially full surface support for the element of closing. In a preferred embodiment, the provision of so that the full surface support of the closure element is formed both in the open position and in the closed position. Unlike full surface support, it can be provided also a contoured support that can be recommended, for example, with a view to reducing friction. To get a handle improved of the closing element, this closing element is at discovered in a recess of the uppermost layer separated from the opening, the longitudinal extension of the recess being adapted to a travel of closing element. The area of closure element that is exposed in the recess separated from the uppermost layer here serves as mango. This area can be grabbed by hand and can also be mechanically requested in the course of an opening or closing of the dust aspirator. Preferably, the configuration of the retention plate that it has the closing element can be chosen so that the latter is consisting of three fixed layers, the central layer presenting a recess intended to receive the closing element. The width of the recess corresponds here to the width of the closure element. For him otherwise, the length of the recess results from the length of the closing element plus the travel path, which corresponds at least to the diameter of the opening to be closed. The central housing layer of the closure element may be formed as well as a frame that closes the four sides. Layer more lower form in this case a full surface support for the closing element. To tightly close the opening of the retention plate when introducing the suction tube, it is planned in the preferred embodiment an additional layer arranged below the bottom layer, between whose two layers a gasket is placed in The opening area. Therefore, a dust filter bag is created Locks for a dust vacuum that is optimized in the technical aspect of its handling. The closing element is completely housed in the outer contour of the plate retention both in the closed position and in the position open Neither in the two extreme positions nor in one position intermediate protruding partial areas of the closure element more beyond the outer contour of the retention plate. Vacuum cleaners Different powder do not offer, in the area of the plate housing Bag retention dust filter, no free space for the entrance of a zone of the closing element that is projected more beyond the outer contour of the retention plate. However, the dust filter bag can be installed in a dust vacuum of this class and can be mechanically closed or opened here in the course of an opening or closing of the dust aspirator. However, there is also the possibility of manual control of the element of One-hand closure. In an advantageous improvement has planned that at least part of the route of offset of the closure element an edge of this element of closure extends to the contour of the edge of the plate retention or beyond this. This setting can be formed, for example, in the recess area of the edge of the plate retention to grab the latter when removing the filter bag from dust of dust vacuum cleaner. In the area of these edge recesses the edges of the closure element can extend to the edge of the recess, with at least a part of the path of displacement the closing element can move can move also here, for example, by means of a grip as a clamp. There is also the possibility here that the edges of the closure element extend beyond the edge contour in the area under the edge. In a first version the edges of the closure element extend only to a very small extent, from the order of magnitude of tenths of a millimeter, beyond the recess of the edge. However, in a second version the extension can be also important, amounting, for example, to a few millimeters or moving even in the range of centimeters. In particular when an offset projection is eventually formed separated to one side of the closure element, which also represents A possible alternative. Due to this execution, a additional possibility to move the closing element when it presents, for example, a mechanical defect. As already mentioned, the closure element is mounted between two layers fixed, providing a lateral guidance by means of souls or similar arranged between the two fixed layers. In the area of these souls may also be provided with stops that define both the open position as the closing position of the element of displacement. Advantageously, the displacement element It has a substantially shovel-shaped plant. The handle of the shovel forms here the maneuver section for the closing element. He lateral shoring of the closure element has materialized here making a layer between two fixed layers additional that forms only one edge and that is configured as a negative mold of the blade-shaped closure element, having Consider the travel route. In the area of the transition from the handle of the blade to the closing surface of the Closure element are formed, due to the plant shaped shovel, butt edges that, in the open position, are applied against corresponding stop edges of the frame shape layer which constitutes the lateral shoring. In the closed position, the edge of the closing element in front of the handle of the blade is applied against a corresponding area of the layer that form the edge. To ensure optimum handling, it is expected that The handle of the blade is associated with the recess. As already mentioned, the longitudinal extension of the recess is adapted to the travel of closing element. Advantageously, the recess in this case has at least a width equal to the of the handle of the shovel of the closing element. As an alternative, it is it is also possible that the blade handle has a wider width than that of the recess. In this embodiment the blade handle is move on one side or both sides applying below to the edges of the recess. In the area of this recess the handle of the shovel now configured as a maneuvering section can now be grabbed by hand or mechanically moved. To this end, it can be planned that a manipulation projection is formed on the handle of the blade. This may be a thickening arranged at the free end of the shovel handle or a recess provided in this area. In a preferred execution the manipulation projection of so that the handle of the blade has a cozy section. This section It can be grasped by hand very simply. Is imaginable also to make a mechanism act in the stretch zone cozy. An execution in which they are Two bend sites formed.

The invention also concerns a vacuum cleaner of powder with a dust filter bag, where the filter bag powder has a retention plate with an opening for a fitting of suction, presenting the retention plate an element of closure that can be automatically moved to a position of closing in the course of the dust vacuum opening.

An execution of this class is also known by US 2 864 462 already mentioned. In this case, the bag aforementioned lock dust filter is installed in the dust vacuum in such a way that a maneuvering projection of said dust aspirator can fit into an end recess free of the closing element. In the course of the opening of the dust aspirator the closure element of the retention plate can be automatically moved to a closed position by middle of this maneuvering projection. Is also known to this regarding the action on the closing element by means of the maneuvering projection when closing the dust aspirator in such a way that a release of the opening of the plate occurs dust filter bag retention.

The maneuvering projection is provided to be elastically flexible configured in the direction of your extension. Due to this configuration, the maneuvering projection it can also be used in those dust vacuum cleaners that they have a narrow radius between the tilting axis of the part of the dust vacuum that carries the dust filter bag and the closure element of the other part of the dust vacuum cleaner. In such narrow radii it is necessarily necessary that the projection of maneuver yields depending on the tilt movement after its fit in the closure element or after the request of the same. The flexibility or elasticity of the maneuvering element is of special importance also to prevent self-retention or self-locking Even when the maneuvering projection initially impacts In the dust filter bag under an unfavorable angle, you can produce an additional tilt of the elastic contraction support of the maneuvering projection (in the particular case, the cover draggable, see below) and so you can vary the angle of attack between the maneuvering projection and the dust filter bag, with what no longer exists any self-retention. Mobility or elasticity has been resolved in particular so that the projection of maneuver can be shortened correspondingly in the direction of your extension in the course of the tilt of the dust filter bag towards the position of use of the dust aspirator. This configuration elastically flexible of the maneuvering projection is also advantageous especially when dust filter bags are not used correspondingly adapted. Particularly when they are used dust filter bags that do not have any device for close the opening for the suction fitting. In a advantageous refinement is planned that the outgoing of maneuver is formed in a draggable lid. A draggable lid of this class is advantageous especially in dust vacuum cleaners with Dust filter bags arranged in caedizo form. In this case, to remove the dust filter bag, the Bag chamber along with the draggable lid. Then, it it then performs the actual opening of the chamber of the bag, for which the draggable lid is tilted in such a way that the dust filter bag is released. In this case, the outgoing of maneuver formed on the draggable cover moves to the element of closure of the retention plate of the dust filter bag so that the opening of the retention plate for the suction fitting However, if desired then a reuse of this dust filter bag, the lid is tilted draggable back towards the bag holder, moving the maneuvering projection back to the closing element such that the opening of the retention plate is released. However, it is entirely imaginable in this regard to arrange the maneuvering projection directly on the dust aspirator, is say, avoiding a draggable lid. In addition, a optimization in the technical aspect of use making the outgoing of maneuver is tiltable against a spring. The second pier (unlike the first spring against which the length of the maneuvering projection) provides substantially a closing force for a movement of the closing element towards The closing position. Particularly in a process of opening the dust aspirator, the second spring still stumbles forward with the maneuvering projection in the subsequent course of the movement of opening and thus produces at least the last part of the movement of closing of the closing element. In addition to the configuration elastically flexible of the maneuvering projection in the direction of its extension, it is also configured so that it can Tilt against a pier. It is also expected that, together with the maneuvering projection, projections are provided of record that, once the tilting of the projection of maneuver, enter registration openings of the other part of the dust vacuum, a dust vacuum closure being possible only when the outgoing record has entered. Be It aims to ensure that a closure of the vacuum cleaner is possible dust only when the dust filter bag is inserted. When no dust filter bag has been placed, the projection of maneuver does not find any corresponding shoring during closing of the dust aspirator, so that it is not moves out of position, which also log projections attached to it remain in their position of blocking. If you try to close the dust vacuum now, the registration overhangs are applied against blocking zones corresponding to the other part of the dust aspirator. Without However, when the dust filter bag is installed, the projection of maneuvering scales in the course of the closing of the dust aspirator, with which the outgoing records are also transferred from such so that they can enter the registration openings of the other part of the dust vacuum and thus allow the closure of said dust vacuum Advantageously, it is provided here that registration projections are formed on a fixedly attached plate with the maneuvering projection. When a filter bag is used dust of the class already described, the maneuvering projection of the vacuum cleaner of powder requests the closure element in the area of its handle blade configured as a maneuver section. When the shovel handle of the closing element is provided with a cozy section, the maneuvering projection is applied behind this section comfortable to the open the dust vacuum and thus move to the closing element to a closed position of the retention plate opening of the dust filter bag. If you should continue using a bag dust filter closed in this way, the maneuvering projection of the dust vacuum cleaner then asks the area of the cozy section, in the course of closing said dust vacuum, in such a way that the closing element is moved to an open position. Is Obviously, even when installing an open dust filter bag in the usual way, no disturbances of any kind occur in the operation of the maneuvering projection. Therefore, it lacks importance that the dust filter bag be installed in the dust vacuum in a closed or open state. When moving the closing element to the open position can occur in a way of execution that the maneuvering projection passes over a manipulation projection of the closure element, preferably the Shovel handle of the closing element. Even after passing above this closing projection the length reserve of the outgoing maneuver (now elastically contracted) is not yet fully extended On the contrary, it is desired that the outgoing of maneuver is applied under certain shortening of its length (elastic shrinkage) against a carriage housing stop after exceeding the handling projection. This has also importance because at the opening the suction fitting of the dust vacuum can first move out of the opening of the filter bag before it is also tilted then in the course of the opening or additional tilting of the maneuvering element, since, meanwhile, it has run out completely the reservation of length due to the extension of the telescopic length of the maneuvering projection. Only then the dust filter bag opening is closed, since now the opening is also free because the fitting of aspiration has spread out. Also, when closing the dust vacuum cleaner is obtained, due to the overflow effect mentioned of the manipulation projection by the maneuvering projection and of the limitation of the movement of the maneuvering projection by application to the carcass integral projection, a sharp noise of click that also signals the user that the vacuum cleaner Dust is now fully prepared to work.

The invention also concerns a bag dust filter of the class cited at the beginning in which it is provided by the edge side a rubber gasket that projects inward beyond the edge of the opening. A filter bag of powder of this class is known, for example, from the document DE-A 1 39 19 256. Reference may also be made also, as a state of the art, to the document DE-A 1 24 07 478. In the dust filter bag known from DE-A 1 39 19 256 is also formed an opening in a movable closure part, where, to use the dust bag, the opening of the plate of retention and the opening of the movable closing part have to be taken to a position of one over another. The opening of the movable closure part has a crown-shaped seal circular. In this meeting it can be produced in the course of the use the effect that the board is positioned in a certain way and it is no longer possible then a closure of the dust filter bag in the desired way. The problem resulting from this, consisting of indicate a dust filter bag of this class in which it is secured a complete closure has been resolved causing that, in coincidence with the sealing gasket, a stabilization part is provided that It projects inwards from the edge of the opening. A board of rubber like the one discussed here, regardless of the material rubber, but this gasket can also consist of another material elastomer or comparable, may experience some deformation charged during the use of a dust filter bag by Suction tube effect introduced. In particular, you can also frequently observe a decrease in properties elastic. This especially when, as often happens, the dust filter bag with retracted suction tube remains in this position for several weeks or months. When removing the tube from aspiration, then a bending of the gasket can occur rubber that is projected inside the dust filter bag. It then blocks a complete closure of the opening. The part of stabilization provided according to the invention now ensures that it is not produce this bent or apply to the rubber gasket a respective prior stamping towards the inside of the bag dust filter (down). The stabilization part can especially consist also of the material of cardboard-paper already commented. Occurs then also a bending of the stabilization part when introducing the suction tube. However, since the part of stabilization, due to its surface stability, cannot fold over itself when removing the suction tube from the opening, it is also maintained, even after a withdrawal full of the opening suction tube, an orientation of the rubber gasket inside the dust filter bag. The stabilization part is properly mounted on site of location of the opening, which is the last to be exceeded by the closing element during a closing operation. In addition, of course, several of these may also be provided. stabilization parts or even an annular stabilization edge which is folded together on itself, for example when introducing the suction tube. It is also advantageous that the extension of the stabilization part in respect to the edge of the opening corresponds approximately to the extension of the gasket rubber inward, that is, in the same direction. This requires also that the rubber gasket is configured in your image with a width significantly greater than until now. On the contrary, the stabilization part properly has an extension that corresponds to the usual width or extension so far inwards of the rubber seal. Referred to a diameter of the opening of the dust filter bag retention plate, the extension of the Inward stabilization part is, for example, 1/10. From correspondingly, the rubber seal usually in the form of circular crown extends approximately to the extent of 2/10 of the opening diameter inwards. A retention plate of a dust filter bag like the one mentioned here owns example, a multilayer structure. It is composed of several layers of cardboard-paper material. In this relationship, the stabilization part is preferably formed in a retention plate layer located in direct contact with the rubber seal It is also advisable to arrange the part of stabilization on the side of the rubber seal that is far from The dust bag. In particular, the stabilization part can be also configured as a tongue.

The subject of the invention is also a dust aspirator of the exposed genus, especially with a
housing for a dust filter bag, where a draggable cover or a closing plate with a maneuvering projection is formed in the housing to actuate a slide as a closing element in a dust filter bag, where, in addition, the projection The maneuver is elastically flexible in the direction of its extension and can be tilted together against a spring. The tilting capacity is given in relation to the closing plate. In particular, reference is also made in this regard to EP A 532057 to the extent that the basic structure of the dust aspirator is affected with the housing for the dust filter bag and the retention plate, which is fixed so mobile in the accommodation.

In this accommodation it is now formed on the side lower the maneuvering projection, which serves to drive a Sliding or sliding closure integrated in the filter bag powder. Regarding this dust filter bag, there is the technical problem of getting the slide drive acting in the most reliable and safe way on the filter bag of dust, along with a simultaneous wear attack the smallest possible or a general impairment as small as possible of the bag dust filter and especially the retention plate. In this aspect, the invention proposes that the maneuvering projection be tied to the closing plate in such a way that in the course of a elastic contraction of the maneuvering projection can be initiated by same time a tilt. The mooring of the maneuvering projection to the closing plate causes, when an elastic contraction occurs in which a linear displacement of the Sliding maneuver, increase the distance between the places of tie up When a tape or the like is used for tying, it it is tensioned and reaches a state in which it can no longer lengthen noticeably. Therefore, by exerting additional pressure on the closing plate, the maneuvering projection is attracted to the plate of closing, so that the tilting of the projection of maneuver towards the closing plate, which takes place of all modes in the course of further drive, albeit sooner. Be it thus achieves a pressure limitation at the same time, since with the increasing elastic contraction of the maneuvering projection in linear direction also increases the pressure exerted by the tip of maneuvering projection on the filter bag retention plate of dust Due to the mooring, which is limited in length, it produces a more premature interruption of this movement of elastic shrinkage under high pressure application on the retention plate that in the case of a movement process without the tie up In another execution, the mooring is expected to be constituted by a soft bending means for bending. The middle of tie can be a ribbon or a string.

In another solution of the exposed problem, it is also provided that the maneuvering projection has lateral support elements intended to rest on a frame of the housing. The lateral support elements can be formed directly on the maneuvering projection. In particular, when it, as preferred, is constructed as an injected piece of plastic. The housing forms even more preferably a sliding path for the lateral support. When, in the course of the movement of the closing plate after an initially performed elastic contraction of the maneuvering projection
in its axial direction, the tilting of the maneuvering projection towards the closing plate takes place, the lateral supports slide on the mentioned sliding paths. It is essential that, by means of these supports, a force load that is first established on the retention plate of the dust filter bag is limited to a certain value or range and causes a movement of the housing closing plate towards the position of closing. In addition, the force, derived through the supports, is absorbed by the dust filter bag housing.

The object is explained in more detail below of the invention referring to exemplary embodiments illustrated in the drawings. They show:

Figure 1, a view of a dust aspirator according to the invention with opening position - reproduced in line of strokes and dots - of the chamber containing the filter bag,

Figure 2, the camera that contains the bag filter in individualized representation in perspective, where an opening for the intake of a suction fitting is closed of the dust aspirator in the area of the retention plate of the dust filter bag,

Figure 3, the area of the camera intended for receive the dust filter bag in the open position of the chamber, in partially broken representation,

Figure 4, the plan view of the area according to Figure 3,

Figure 5, a maneuvering projection of the dust aspirator provided with a plate in representation individualized, specifically on a side elevation,

Figure 6, the representation according to Figure 5, but in plan view,

Figure 7, the representation according to Figure 5 in a view from below,

Figure 8, the section according to the line VIII-VIII of Figure 7,

Figure 9, the upper area of the filter bag of dust with its retention plate individually in perspective, in open state,

Figure 10, the plan view of the bag dust filter with its retention plate, having suppressed a uppermost layer,

Figure 11, a corresponding representation to Figure 3, but concerning a position in the course of the opening of the dust vacuum or closing of the opening of the retention plate,

Figure 12, another representation according to Figure 3, but concerning the open position of the dust aspirator or to the closed position of the opening of the retention plate of dust filter bag,

Figure 13, another representation according to Figure 3, but concerning a position during the closing of the vacuum cleaner of dust or during the opening of the plate opening retention,

Figure 14, a plan view of the plate retention of a second execution example of a filter bag dust with open slide fastener,

Figure 15, a cross section through of the object according to Figure 14, cut along the line XV-XV,

Figure 16, a representation according to Figure 14 after removing the cover layer,

Figure 17, a cross section through a dust filter bag installed in a dust vacuum with a retaining plate corresponding to Figures 14 to 16,

Figure 18, an enlarged detail of the
representation of Figure 17 in the area of the dust aspirator suction tube,

Figure 19, a sectional representation transverse of the dust filter bag housing with a closing plate and an elastically contractable maneuvering projection in a mooring area, being in maneuvering projection in its extended out position,

Figure 20, a representation according to Figure 19, being in maneuvering projection in a position partially retracted,

Figure 21, a second example of execution of a maneuvering projection of the dust aspirator provided with a plate, individually represented, specifically in elevation side,

Figure 22, the representation according to Figure 20, but in plan view,

Figure 23, the representation according to Figure 21 seen from below,

Figure 24, the section according to the line XXIV-XXIV of Figure 23,

Figure 25, a representation according to Figure 21, but with the maneuvering projection displaced,

Figure 26, a representation according to Figure 25, but in plan view,

Figure 27, a sectional representation transverse of the dust filter bag housing with a closing plate and with the maneuvering projection according to Figure 21, the maneuvering projection being in an extended position out,

Figure 28, a sectional representation transverse of the dust filter bag housing with a closing plate and with the maneuvering projection according to Figure 1, the closure plate being set in the filter frame, and

Figure 29, a representation according to Figure 28 in plan view.

The electric dust vacuum cleaner 1 represented It is conceived as a handheld device. It has a housing 2 to which a handle 3 is attached at the top with an extreme grip 4. In the transition zone between the handle 4 and the handle 3 is located a on / off switch 5. The cable connection Electric has been designated with the number 9.

The housing 2 is subdivided into a housing of engine 6 and a corresponding chamber 7 arranged above to receive a dust filter bag 8. The engine fan is not Reproduced in detail in the drawing.

The side of the remaining dust filter bag 8 turned towards the motor housing 6 is, in the position of operation of the dust aspirator according to Figure 1, in conjunction with connection by fitting with a fan air duct engine.

The motor housing 6 transitions on the side bottom towards a tube coupling 10 that establishes the connection of air flow to the suction nozzle 11.

Regarding the suction nozzle 11, it can it is a so-called suction / brushing nozzle that contains a brush roller in the mouth of the nozzle in rotation by means of a separate maneuver.

Therefore, the fan motor works from the bottom up and, as a consequence, drives the dust-laden air into the dust filter bag 8 arranged hanging above the housing 6 of the motor.
tor.

The cross section of the housing 2 generally elongated rectangular with wide sides weakly domed and narrow sides of the same type. In the figure 1 you can see the dust vacuum from the wide side.

Chamber 7 housing the filter bag corresponding powder 8 in cross section is formed by a 12 stiffened textile bag with a wire basket, which makes transition down, that is, from the side of the motor housing, towards a stiffened edge in the form of a filter frame 13. The bag stiffened textile 12 may be associated with the filter frame 13 by middle of the clamp / detachable plug joint. The plugged in area It is lowered with respect to it.

To remove the dust filter bag you can open the housing 2 leaving in practice completely free its cross section. The opening position follows from the Figures 1 (here in dashed lines and points), 3, 4 and 11 to 13. The abatement shaft 14 that makes this possible is located on one side narrow housing 2. Its support bushings on the side of the frame filter are designated with 15. These support bushings 15 are located in the transition zone between the narrow side and the side chamber width 7. Between both support bushings 15 extends a Continuous support bushing of motor housing 6.

In the junction area of the housing 6 of the motor and chamber 7 is also integrated with a draggable cover 7 in the form of an intermediate support on which the bag is seated dust filter 8. This intermediate support T is known for the German patent application published 39 11 580 of the applicant. Reference is made in this regard to the entire content of this document.

The draggable cover T has a plant adapted to the cross-section of the housing, but recedes with respect to the enclosure wall of the housing 2, so that said lid is subtracted from view in substantially complete degree in the coaxial position of the motor housing 6 and the chamber 7 which can be seen in Figure 1. The draggable cover 7 is also of collapsible construction, also forming the draggable cover T by the hinge side, and the same also the filter frame 13, two support bushings. The draggable cover T is lowered in this case around the same axis of abatement 14 as the chamber 7.

Dust filter bag 8 directly adjacent to the draggable cover T has a bottom configured as a plate of retention 16. Its general plant also corresponds to the shape of the cross section of the filter frame 13, which forms steps edge 17 for shoring support of retaining plate 16 on the inner wall. Thus, the retaining plate 16, in the open position of the device cannot slip in the chamber 7. The common abatement shaft 14 of the filter frame 13 and the draggable cover T extends approximately to the height of the step 17 of the support edge of the retaining plate 16 of the filter bag

The housing 2 being closed, that is, in the operating position of dust vacuum cleaner 1, the channel engine fan air penetrates with one end of stepped cylindrical mouth in the lower zone 18 'of a suction fitting 18. The latter protrudes from the upper side of the draggable cover T, the suction fitting 18 being formed same as the draggable cover T and penetrating the support fitting 18, going through an opening 19 of corresponding cross section of the retention plate 16 of the filter bag and closing the edge, inside the dust filter bag 8.

The suction fitting 18 narrows towards its free end, so that its introduction into opening 19 has practically a centering effect.

To remove the dust filter bag 8, Tilt the chamber 7 with the draggable cover T, after releasing a lock closure on the side of the housing, to the open position shown in Figure 3. To release the filter bag now powder 8 for its extraction the draggable lid T is lowered separating it from chamber 7, for which a handle 20 on the upper side of the remaining draggable cover T away from the suction fitting 18. This handle 20 is arranged in a collapsible manner by means of a film hinge in the upper side of the draggable cover T.

So that in the operating position of the dust vacuum according to Figure 1 be avoided due to position dump of the dust filter bag 8, a fall of material sucked into the area of the motor housing 6, it may be formed a valve gate at the free end of the fitting support 18.

On the lower side, that is, on the side of the T draggable cover, a tiltable plate 21 is associated with it for holding a maneuvering projection B. This plate 21 is arranged tiltable by means of a hinge 22 at the free end of the draggable cover T. The plate 21 extends from the hinge 22 to about the center of the draggable cover T, embracing at the same time the suction fitting 18. To this end, the plate 21 has a hole 23 as an elongated hole. Area of the plate 21 that is away from the hinge 23 is of narrow configuration. In this area it is arranged with adjustment of forms a housing chamber 24 of cross section rectangular that projects beyond the end zone of the plate 21. In this housing chamber 24 the projection of maneuver B in a freely movable way, with the maneuvering projection B substantially by a maneuvering arm 25 rectangular in cross section and an appendix of maneuver 26 formed at the free end of this maneuver arm 25, that is, at the far end of the housing chamber 24. In the position according to Figure 3, the maneuvering appendix 26 looks at address to dust filter bag 8.

Maneuvering projection B is construction elastically flexible in the direction of its extension. It serves to this a compression spring 27 arranged in the chamber of housing 24, which hugs a spike 28 arranged in the end of maneuvering arm 25 that penetrates the chamber of housing 24. At the other end, compression spring 27 is rests on a front wall 29 of the housing chamber 24. This The latter is closed with a cover 30 that hugs with a tightening effect to the front wall 29 and to the side walls of the chamber of accommodation 24. In the extreme open area, that is, in the area in which the maneuvering arm 25 penetrates the housing chamber 24, the cover 30 has a support collar 31 that projects towards inside. The latter serves as a limit stop for the arm of maneuver 25 loaded by compression spring 27 in the direction out, whose arm has a respective support edge corresponding 32.

Plate 21 and maneuvering projection B led by this they are tiltable around hinge 22 against a pier 33. This pier 33 extends here between the lower side of the draggable cover T and the side of the plate 21 associated with this side lower. To this end, on the underside of the draggable cover T a corresponding recess 34 is formed to receive an end of the spring 33. The other end of the spring 33 hugs a projection circular 35 of the plate 21 in the transition zone of said plate 21 to the housing chamber 24. The spring 33 loads the plate 21 and the maneuvering projection B connected with it, always in the direction to the dust filter bag 8. The tilt path of the plate 21 is limited in such a way that, when the lid is tilted draggable T separating the dust filter bag 8 or its plate of retention 16, the plate 21 is supported with the edge of the projection 35 - that penetrates the hole area 23 - in a collar 36 on the side of the outer edge of the suction fitting 18 (see Figure 12). As already described above in detail, the spring 33 is especially also of importance for further realization and especially the consummation of the closing movement when opening the dust vacuum

The dust filter bag 8 is composed substantially of the retention plate 16 already mentioned and a dust bag 37 preferably made of paper, joined by example, by sticking to the bottom side of this retainer plate 16.

The retention plate 16 has an almost contour corresponding to the inner side of the filter frame 13 and is composed of four overlapping layers of material cardboard-paper These layers 38 to 41 are glued one with other. The retaining plate 16 thus formed is supported, in a state installed from dust filter bag 8, on step 17 of the edge of the filter frame 13. To prevent the filter bag from sinking powder 8 in the operating position of the dust vacuum cleaner 1 according to Figure 1, there are envisioned devices 42 which are arranged on the inner side of the filter frame 13 and acting on the upper side of the retaining plate 16. By therefore, the dust filter bag 8 is locked in the area of its retention plate 16.

To achieve a safe disposition in position correct dust filter bag 8, retention plate 16 it presents in the area of both narrow sides some characteristics of guidance 43 that fit against conjugate features 44 of the inner wall of the filter frame 13. Regarding the orientation features, these are outgoing in the form of trapezoid on the narrow side of the plate-shaped body that it constitutes the retention plate 16. A position of correct alignment between opening 19 and the suction fitting 18.

On the edge edges of the longer sides the retaining plate 16 has grip openings 45. Both 45 grip openings are chamfered and open to the wall corresponding inside of the filter frame 13. In position opening of the housing 2 and after tilting the draggable cover T down, the dust filter bag 8 can be grabbed comfortably and removed from chamber 7 through the handle of fastening of the central area of the retaining plate 17 narrowed to Wasp size way.

As already mentioned, the retention plate 16 consists of four overlapping layers 38 to 41, being glued the paper dust bag 37 on the underside of the layer plus lower 41. This lower layer 41 has a circular hole 46. Layer 40 disposed on this layer 41 is configured with the same contour and same surface as layer 41 and presents also a hole 47 arranged coaxially to the hole 46 and which It also has the same radius as hole 46.

Layer 39 disposed on layer 40 is configured as a distance layer for layer 38 that forms the ceiling and serves to constitute a free space 48. Figure 10 shows a plan view of layer 39, in which it has been deleted the layer 38 that is on this layer 39 and that forms the roof. The layer 39 is substantially configured as an edge strip that It has the same outer contour as the other three layers. Specifically, this has been resolved so that in the area of hole 47 of layer 40 are arranged on the edge side outer sections of layer 49 to 51 that extend from the respective outer edge to the vicinity of hole 47, leaving at the same time a separation distance between the hole 47 and the inner edge of the respective layer strip. The layer strips 49 and 51 arranged on the longitudinal sides of the retention plate 16 is attached with the layer 50 strip on the side front turned towards hole 47 and extend from it to the area of the grip openings 45, whose grip openings 45 they are formed by corresponding recesses of layers 38, 40 and 41. The distance between the two inner edges of the edge of the layer strips 49 and 51 have been chosen here greater than the distance between the mutually opposite edge edges of the openings of grip 45. On the side of the grip openings 45 that remains in front of the layer strips 49 and 51, the layer strips are they continue as sections of layer 49 'and 51', keeping the Same time the same width. Keeping a distance with with respect to the grip openings 45, the layer strip sections 49 'and 51' get thicker so that, starting from the outer edge of the retaining plate 16, extend to the central area of said retention plate 16, leaving the same time a slit 52. These widened areas of layer 39, which, as a consequence, they are arranged in the end zone of the plate retention 16 in front of hole 47, have been designated with reference symbols 53 and 54. In the transition zone between the sections of layer strip 49 'or 51' and zones 53 or 54 are thus formed stops 55 that act in the longitudinal extension of the retention plate 16.

The uppermost layer 38 that forms the roof It has an identical contour configuration and almost also in surface to that of layers 40 and 41. It is also planned here a hole 56 coaxial to holes 46 and 47. These holes 46, 47 and 56 form the aforementioned opening 19 of the retention plate 16. In addition, the uppermost layer 38 is provided with a recess 57 open at the edge, arranged above the recess 52 of the layer 39 and endowed with almost the same width as slot 52. This recess 57 extends from the narrow side of the plate retention 16 that faces the opening 19, in the direction of the longitudinal extension of the retaining plate 16, up to approximately the center of the latter.

Between the two lower layers 40 and 41 is placed and preferably glued a rubber gasket 58. This gasket rubber 58 is arranged in the area of holes 46 and 47 and it has a circular opening 59 that is constructed with a diameter smaller than that of holes 46 and 47. The opening 59 of the rubber gasket 58 is here coaxially aligned with the holes 46 and 47. The rubber seal 58 serves to establish a closure airtight between the dust filter bag 8 and the suction fitting 18 when this fitting 18 crosses the opening 59 and penetrates the inside the dust filter bag 8.

In the free space 48 formed between the layers 38 and 40 and limited by the strips of layer 39 an element is mounted of closing V in scrollable form (see Figure 10). The element of closure V presents here substantially a plant in the form of shovel, being placed a handle 60 of the shovel, in the position shown in Figure 10, in the recess 52 of layer 39. The plate closure 61 joined with the handle 60 of the blade has a width almost corresponding to the distance between the inner sides of the edge of layer 49 and 51 strips or layer strip sections 49 'and 51' and, in the position of Figure 10, extends from the stops 55 of layer 39 to the edge of hole 47 of layer 40 or to the edge of the opening 19.

The handle 60 of the blade of the closing element V it is exposed in recess 57 provided in the uppermost layer 38 and serves as a maneuver section. To this end, the handle 60 of the blade has a manipulation projection M in the form of a site layered 62. This results in a cozy section 63 at the free end of the handle 60 of the shovel.

It is also possible to configure the projection of M manipulation such that in the free end zone of the handle 61 of the blade is arranged a thickened area. As an alternative to this, in this area a recess in form can also be provided of a longitudinal groove or the like.

Because of this board configuration retention 16, it is now possible to discretely close or open the opening 19 by means of the closing element V. For this purpose, the closure element V is displaced longitudinally in the area of the clearance 48 of layer 39, the closure element V being completely housed in the outer contour of the plate retention 16 both in the closing and opening position and in any intermediate position. This means that there are no parts of the closure element V protruding from the outer contour of the plate holding 16 neither in the closed position nor in the position of opening. This is also not possible in the execution example shown, since the shape and size of the filter frame 13 of the dust vacuum 1 would not admit an enlarged contour outside of the retention plate 16.

The displacement of the closing element V is effected by grabbing or attacking on the manipulation boss M, the which is exposed for the attack in the recess zone 57 of the uppermost layer 38. This recess 57 is adapted here in its longitudinal extension to the travel path of the element of closing V. By moving the closing element V from the position open according to Figure 10 to a closed position in the direction of the arrow and the opening 19 of the plate is closed retention 16 by means of the closing plate 61. The element of closure V is guided in this case laterally by the layer strips 49 and 51. The extreme situation of the closing position is reached when the front side of the closure plate 61 encounters the Inner edge edge of the front layer strip 50.

The open position is defined by the impact already mentioned of the closing plate 61 against the stops 55 of the layer 39.

To remove from the chamber 7 a dust filter bag 8 provided with a retention plate 16 of this kind, it is first made to swing this bag together with the draggable cover T from the operating position according to Figure 1 to an extraction position according to Figure 3. As can be seen in this representation, the tilting plate 21 provided with the maneuvering projection B is located here in a position parallel to the draggable cover T between the latter and the retaining plate 16. The maneuvering appendix 26 of the projection of maneuver B is applied behind the cozy section 63 of the handle 60 of the blade of the closing element V. If the trailing cover T is then swung out of the chamber 7 by means of the handle 20, the maneuvering appendix 26 that attacks in the cozy section 63 it then causes the closing element V to move to the closed position of the opening 19. In the course of tilting of the draggable cover T basc ula at the same time the plate 21 with the maneuvering projection B around the hinge 22, due to the spring 33, such that the cozy section 63 of the closing element V is always requested by the maneuvering appendix 26, at least in a large part of the tilting path of the draggable cover T. There is then a scissor opening between the draggable cover T and the plate 21 provided with the maneuvering projection B. Because the maneuvering arm 25 is elastically mounted on the housing chamber 24, this arm can be diverted into the housing chamber 24 in accordance with the evolution of the movement. The elastic support of the maneuvering projection B and the elastic tilting capacity of the plate 21 and of the maneuvering projection B connected therewith always ensure that the maneuvering appendix 26 is always applied behind the cozy section 63 along the entire path of movement of the closing element V. As soon as the closing element V reaches the closing position of the opening 19, the front edge of the closing element V or of the closing plate 61 is supported, as already mentioned, at the inner edge of the strip 50 of the layer 39. In this position the bending site 62 of the handle 60 of the blade also reaches the front edge 64 of the recess 57 of the uppermost layer 38. In this position the projection of maneuver B has continued to strive to move the closing element V further in the direction of the arrow (y). The maneuvering appendix 26 is then still applied behind the cozy section 63 of the handle 60 of the blade. In the course of the additional tilting of the draggable cover T to separate it from the chamber 7 there is then an application of the maneuvering appendix 26 under the foldable section 63, which due to this and the solicitation still prevailing in the direction of the arrow (y) is bent upwards, that is, passing through the recess 57 of the uppermost layer 38. A second bending site 65 is then established (see Figure 11). It is shown here that the handle 60 of the blade can be configured in width as the recess 57, and possibly also narrower than this, since, otherwise, the area requested or taken down by the maneuvering appendix 26 cannot be deflected in the position shown in Figure 11. This
would lead to destruction of the closure element V in the area of the attack surface of the maneuvering appendix 26. However, provided that the displacement of the closure element and the action on the handle 60 of the blade are not materialized by means of a bending, but only by means of a manipulation projection M applied, for example, on the handle of the blade, it is also possible and it is preferred that the handle 60 of the blade be formed with a width greater than that of the recess 57, whereby the edges of the recess are caught down by the handle of the blade.

In the course of the additional tilting of the draggable cover T towards a position according to Figure 12 in which the dust filter bag 8 is released, the maneuvering projection B passes with maneuvering appendix 26 on the cozy section 63, with that the latter stands through the recess 57 of the layer more upper 38. Maneuvering projection B then reaches a position extreme previously defined, for which, as already described, the projection 35 that penetrates the hole 23 of the plate 21 rests on collar 36 arranged on the side of the outer edge of the fitting suction 18. The draggable cover T can also be tilted to a greater extent than up to the 90º position shown in the Figure 12, whereby the dust filter bag 8 can be removed without camera problems 7.

To remove the dust filter bag 8, you grab this in the area of the grip openings 45 of the plate hold 16 and drag it out of chamber 7 against of the insertion action of the insertion devices 48 of the filter frame 13.

However, if you should continue to take advantage of a dust filter bag 8 closed in this way, opening the opening 19 is then made in an extremely simple manner. TO for this purpose, the trailing cover T is tilted back in the direction to chamber 7, so that the maneuvering projection B requests with the free end zone of maneuvering arm 25 to the bend site 62 applied to the front edge 64 of the recess 57 of the plate retention 16. In the course of additional tilting of the lid draggable T towards the closed position, the maneuvering projection B moves the closure element V to an open position of the opening 19, for which the maneuver arm 25 pushes in front of yes to the closure element V in the area of its blade handle 60. As It has already been mentioned above, it is of importance in this context especially also the ability to vary the length of the maneuvering projection B against compression spring 27. Specifically, when, due to an angular position unfortunate, a blockage would not adjust itself by tripping over the maneuvering projection B with the handle 60 of the blade. The time of this, the length of the maneuver arm 25 is shortened first, using also the angle of action on the handle 60 of the blade, so that you can overcome a self-retention or a blockage that It will eventually occur. In the further course of the movement of tilt of the draggable cover T, the scissor arrangement of the draggable cover T with respect to plate 21 and to maneuvering projection B disposed therein. After of opening the opening 19 of the retaining plate 16 completely, supporting corresponding edges of the closing plate 61 in the stops 55 of layer 39, the maneuvering projection B passes, in the zone of the free end of the maneuvering arm 25, on the cozy section 63 and is placed again with its maneuvering appendix 26 behind this section 63. The fact that the maneuvering projection 26 collides with a stop 26 'integral with the housing (see, for example, Figure 3). This occurs preferably also under a certain noise development that signals the user a correct opening state of the bag filter and together a functionally service availability impeccable dust vacuum.

The dust filter bag 8 represented and described can also be installed with its retention plate 16 in 1 vacuum cleaners that do not have a device for automatic closing or opening in the course of an opening or closing of the dust vacuum. There is now also the possibility of move the closing element V by hand to the respective position to which end the hand section 63 is grasped by hand and It can thus effect a translation of the closing element V. In addition, there is still the possibility of taking the closing element V in the area of the grip openings 45, for which purpose it is taken by clamp and the closing element V located at the discovered in this area between layers 38 and 40. This works also in the concrete example, as shown in the example of execution, in which the closing element only reaches the contour edge of retaining plate 16 in the area of the grip openings 45 and not projected beyond this contour.

When using a dust vacuum 1 that is provided with a maneuvering projection B as shown and described, it is also imaginable the use of filter bags conventional dust, i.e. dust filter bags without element of closing V. In this case, when there is a tilting of the lid draggable T to an open or close position, the maneuvering projection B would run on retaining plate 16 without that functions of any kind will be executed.

Finally, it is also possible to make the plate 21 of the draggable cover T provided with registration projections. Once the tilting of the maneuvering projection B has been carried out, these registration projections penetrate corresponding registration openings which in the exemplary embodiment shown may be the grip openings 45 of the retaining plate 16. The construction has been chosen in this case. so that a closure of the dust aspirator 1 is possible only when the registration projections are inserted in the registration openings or the grip openings 45. This device should serve to make possible a closure of the dust aspirator 1 only when the dust filter bag 8 is placed. When a dust filter bag 8 is inserted in the chamber 7, the maneuvering projection B then swings as already described, in the course of closing movement, towards the lower side of the draggable cover T, whereby the registration projections are also transferred correspondingly, specifically so that these, in the closed position of the c Mara 7 with respect to the draggable cover T can enter the corresponding registration openings or grip openings 45. However, when no dust filter bag 8 is placed, the maneuvering projection B then finds no reaction support for its tilt, so that the registration projections remain in their locked position. In this blocking position these projections are supported in the course of the movement
for closing the draggable cover T, for example, on the outer edge of the filter frame 13, thereby counteracting a closure of the dust aspirator 1. If registration projections of different sizes are now associated with corresponding registration openings of different size, a correct position of the dust filter bag 8 in the chamber 7 is also guaranteed.

It is represented and described, first of all with reference to Figure 14 in a second example of execution, a retention plate 101 of a dust filter bag. How can shown in Figure 15, the retaining plate 101 is built with a total of four layers (Figure 15 is a strongly expanded representation). An upper layer 102 has a circular opening 103 with an edge 104. In addition, in the layer upper 102 is formed a - wide - slit 105. Under the upper layer 102 a movable closure element is arranged V. The closure element V is provided, at its end on the side of the handle, of a supplement 106 which in the example of execution consists also in a layer of cardboard. Supplement 106 penetrates the slit opening 105. The closing slide V can be displaced by hand or automatically through this supplement 106.

The closing slide V is indicated in the Figure 14, in terms of its external dimensions, by means of the line of strokes and points. The opening 107 of the central layer 108 is say, of the third layer considered from the top of the plate retention 101, is larger than the opening -superior - 103 or the lower opening 109 (see Figure 15). Between layer 108 and the lowermost layer 110 of the retaining plate 101 is seized a rubber seal 111. For example, rubber seal 111 is secured by bonding between layers 108 and 110. The rubber seal 111 is extends in the form of a circular crown inward from the edge 104 of the opening and has an inner opening edge 112.

In the middle layer 108, that is, the third layer, considered from above the retaining plate 101, is formed the stabilization part with the configuration of a tongue 113. The tongue 113 is shaped at the site of the opening 103 furthest from a front edge 114 of the element of V closure (referring to the retracted position according to Figure 14).

Due to the conformation of the tongue 113 in the layer 108 of the retention plate 101 is achieved that this, in the example of execution, is also constituted by a material of cardboard-paper, as is the case with the others layers of the retention plate. The tongue 113 has an extension (e) from the edge 104 of the opening to the inside of the opening 103, which corresponds approximately to half of the extension (E) of the rubber seal 111 from the edge 104 of the opening into the opening 103. In the example of execution a diameter (d) of the circular opening 103 is of approximately 5 mm The extension (e) corresponds to approximately 1/10 of this diameter, that is, about 5 mm, while the rubber gasket 111 extends approximately 1 cm inside of opening 103 (measure -E-).

The sectional representation of Figure 16 shows a section in the plane between layers 115 - the second layer from above - and layer 108. To indicate that these layers they are stuck together with each other and therefore form a whole coherent, the section plane, as long as it matches the paste, It has been reproduced in striped representation.

It can be seen that tongue 113 is formed directly on layer 115. Between layer 115 and layer 108 the rubber seal 111 is imprisoned, running its edge exterior only partially circular.

In the representations of Figures 17 and 18 the behavior of the tongue 113 and the action of said tab 113 in the operating state of the vacuum cleaner of powder.

It is here in particular a vacuum cleaner powder with a so-called draggable lid 116 on which it is shaped a suction tube 117. Regarding the characteristics of the dust extractor in particular, referral is made, for example, to EP A 25 32 057.

The suction tube 117 crosses the openings 103 or 109, as well as the openings of the intermediate layers of the retaining plate 111. The measurements of the openings and especially the measure of the tongue 113 are adjusted to the diameter of the tube of suction 117 in such a way that a bending of the tongue results 113 into the dust bag. However, the board 117 completely overlaps tongue 113 - and projects radially inward beyond it - and applies to all the perimeter of the suction tube 117. When removing the suction tube 117 of the retention plate 101 of the dust filter bag remain certain prestressed inward and a corresponding action of the tab 113 on rubber seal 111 due to bending produced from the tongue 113. This has the consequence that the rubber gasket 111 does not extend upward at all times in direction to the opening 103 and, therefore, the closure element V It can be approximated without major difficulties. In the state of closure, the closure element V attacks on the upper side of the tab 113 - referred, for example, to the representation according to the Figure 15 -.

With respect to Figures 19 and 20, it is represented in cross section, partially, a housing 118 for a dust filter bag. Regarding the dust filter bag, it you can especially see in cross section a plate of retention 101 as described above.

The dust vacuum or housing 118 has a closure plate 119 with the suction tube 117 already mentioned. Likewise, a maneuvering projection 120 can be seen which presents an appendix 121 with which it acts on the closure element V of The dust filter bag. Maneuvering projection 120 is movable linearly into a housing 122 against force of a spring 123. In addition, the closing slide 120 is - directly - tied to closure plate 119 by means of a belt 124. In particular, the mooring point 125 of the belt 124 in closure plate 119 is formed on the underside of this last, near a turning joint 126.

In the position represented in Figure 19, in which the operating slide 120 is seated only on the retention plate 111 of the dust filter bag, the tape 124 It is in a relaxed position. It still has a certain reserve in length that can be used.

In the position represented in Figure 20 it has initiated a rotation movement of the closing plate 119, so that it swings around the axis of the joint 126 towards the retention plate 119 of the dust filter bag. During this movement remains unchanged the relative position of the maneuvering projection 120 in relation to the retention plate 111. Maneuvering projection 120 penetrates somewhat into the projection of maneuver 122 only against the spring elastic force 123. This movement can continue until the tension is tightened. tape 124. This tension is presented before it has been used the maximum input capacity the maneuvering projection 120 in the housing 122. As soon as tape 124 is tensioned, it produces, so to speak, an extraction of the maneuvering projection 120 as a result of an additional rotation of the closure plate 119 around the axis of the joint 126, so that this projection - by means of housing 122 - scales around its articulation 127 around the closure plate 19 towards the lower side of said closure plate 119. An accumulation of additional pressure of the maneuvering projection 120 on the plate retention 111 of the dust filter bag.

For the rest, regarding the configuration general housing and closing plate and projection of maneuver is also referred to documents not yet published of the German patent application 43 41 248.

As an alternative - although this has not been represented in detail - may also be formed in the maneuvering projection 120 laterally arranged supports, is say, perpendicular to the drawing plane. These supports can come to rest, for example, on the edge - interior - 128 of housing 118 for the dust filter bag. Through an adjustment suitable between the total length of the maneuvering projection 120 and the provision of the supports can be achieved that the projection of maneuver 120 come to apply certainly with its appendix 121 on the retention plate 111 of the dust filter bag, but during the described tilting of the closing plate 119 the force increased resulting is absorbed by the support edge 126 in the course of the elastic - linear - contraction of the maneuvering projection 120. The support edge 128 or the supports, which are formed laterally in the maneuvering projection 120, they can be then further developed in particular so that it slide one over the other under the least possible friction.

In another example of execution a closing plate 219 with suction fitting 217 is mounted as described with the possibility of tilting by means of a turning joint 226 with respect to a housing 202 of the dust aspirator. A maneuvering projection 220 on a plate 221 is arranged so tiltable by means of a hinge 222 at the free end of the closure plate 219. On the axis 227 of the hinge 222 is arranged an expansion spring 233 that is supported through a loop 234 on the bottom side 237 of the closure plate 219, hugging said spring to the suction fitting 217 in a manner adapted to the circular crown shape of this one. Due to strength of the expansion spring 233, the closing plate 219, when open, and plate 221 are maintained so that they adopt a slight V shape. The opening angle of this V shape is limits by applying an appendix 224 configured in L-shape - which joins a hole 223 as a hole elongated for fitting 217 - against this fitting 217 (see Figure 27).

The suction fitting 217 is provided, in its free end of a valve gate 205 that prevents it from falling Backward sucked material, due to the inverted placement of the dust filter bag 208 in the operating position. Be it is here a membrane reinforced by nerves that is simply riveted against a mandrel 218.

The plate 221 mounted in a tiltable manner on the lower side 237 of the closing plate 219 carries the projection of maneuver 220 movably mounted against the force of two springs 228, 229. In the extended position out the line of the contour of the plate 221 with extended maneuvering projection 220 outward approximately fits the contour shape of the closure plate 219 or the inner side of the filter frame 213 which welcomes the closing plate 219 and the plate 221. That is, the maneuvering arm 225 has approximately the same width as the plate 221. At its free end the maneuver arm 225 carries in slightly off-center position, a maneuvering appendix 216 that drag in the way described at the beginning to a closing element V of a retention plate 201 of the dust filter bag 208.

Referring to Figures 21 to 26, the assembly of the maneuvering projection 220 on the plate 221 is explained in more detail. The plate 221 has vertically projecting legs 230, 231 that laterally engage the maneuvering projection 220 and which are joined in its free end, on the side opposite the axis 227, by means of a latch 232. Between the lower side 235 of the plate 221 and the latch 232 the operating arm 225 of the operating projection 220 is guided. A locking appendix 236 it stops at latch 232 when tensioning springs 228, 229 and prevents removal of said latch. The springs 228, 229 are retained in channels 238, 239 of the maneuvering projection which are U-shaped in cross-section. The free ends of the wings of the channels 237, 238 rest on the lower side 235. For better guidance of the maneuvering projection, projections 240, 241 project outwardly of the free legs 230, 231 of the plate 221, of such that the channels 238, 239 are retained between these projections and the lower sides 235. In their longitudinal extension, each channel 238, 239 is closed at one end by a wall on which the springs 228, 229 are supported. The longitudinal end the opposite is open and there springs 228, 229 are supported on counter support 242, 243 integral with the plate. When closing the dust filter bag 8, the maneuvering projection 220 is first displaced in the direction of the hole 223 against the force of the springs 228, 229. The hole 223 is then located between the channels 238, 239 and the arm of maneuver 225 that joins the channels 238, 239 can present a rounding 244. To limit the movement of the maneuvering projection 220 towards the hole 223, stops 246 are provided on the wall 245 of the appendix 224 on which the front side falls of rounding 244 of the maneuvering projection 220. The retaining plate 201 with the closure element V is configured substantially corresponding to the preceding embodiments. However, the blade handle 260 has a handling projection here.
in the form of a supplement 261 (see Figure 28) that is flush with the uppermost layer of the retaining plate 201 that forms the roof. The width of the supplement 261 corresponds to a measure somewhat smaller than the groove width of the uppermost layer of the retaining plate 201 that is necessary for the maneuver of the closure element V (see also in this regard also Figure 9). The maneuvering appendix 216 of the maneuvering projection 220 protrudes in the direction of movement against the angular space formed by the upper side of the blade handle 260 and the longitudinal side of the supplement 261, thus finding a counter support. As an alternative to the supplement, a rebate could also be provided.

By tilting the closing plate 219 from the position shown in Figure 27 to the position according to Figure 28, plate 221 and maneuvering projection 220 are applied to the side bottom 237 of closure plate 219. If the plate is missing retention 201 and, therefore, the V-position is retained between the closing plate 219 and the plate 221 or the projection of maneuver 220, the closing plate 219 cannot be closed. registration projections 203, 204 on plate 221, formed by a widening with respect to the free end of the plate 221 or the maneuvering projection 220, penetrate, under maximum tilting, in registration accommodations 206 of outstanding 207 accommodations inwards in the filter frame 213. It is thus possible also a dust vacuum closure only when the bag is placed filter 208.

In the closed state (see Figures 28 and 29), the closing plate 219 is interlocked because some appendages of insert 209 through holes 210 of the closing plate 219. Embedding Appendices 209 may protrude from an edge of seal 212 which is independently arranged over an angle 211 of the filter frame 213, at least along the extension longitudinal of said filter frame 213. Against the inner side smooth edge 212 of the joint comes to be applied tightly, in closed state, a sealing lip 214 that extends peripherally on the outer side of the closure plate 219. As already described, in this example of execution it can be carried out also a mooring of the maneuvering projection 220 to the closing plate 219, for example with the help of a loose flexural means, to initiate at the same time, in the course of an elastic contraction of the maneuvering projection 220, a tilting of said projection of maneuver 220.

Claims (13)

1. Dust vacuum with a housing (118) and a dust filter bag (8) housed therein and having a retention plate (16), being formed in the housing (118) a closing plate (119) with a maneuvering projection (B / 120) for maneuver a closing element (V) of the retention plate (16) closing an opening (19) to establish a connection joint fitting in a dust vacuum fan air duct with dust filter bag, the maneuvering projection being (B / 120) of elastically flexible construction in the direction of your extension and being tiltable as a whole, and being built the maneuvering projection (B / 120) so that this, in the course of the tilt of the closing element (V), moves with respect to the opening (19) by cooperation of the maneuvering projection (B / 120) with a handling projection (M) formed at one end of the element closing (V) opposite the opening (19). 2. Dust vacuum according to claim 1, characterized in that the manipulation projection is a recess. 3. Dust aspirator according to claim 1, characterized in that the manipulation projection is a supplement applied on the closure element (V). 4. Dust vacuum cleaner according to one of claims 1 to 3, characterized in that the retention plate is composed of several layers of cardboard-paper, a layer (39) being arranged on the layer (40) as a spacer layer for the layer (38) that forms a roof, in order to produce a free space
(48). 5. Dust vacuum according to one of claims 1 to 4, characterized in that the maneuvering projection (B) is formed in a draggable cover (T). 6. Dust vacuum according to one of claims 1 to 5, characterized in that the maneuvering projection (B) is tiltable against a spring (33). 7. Dust vacuum cleaner according to one of claims 1 to 6, characterized in that, together with the maneuvering projection (B), registration projections are provided which, once a maneuvering of the maneuvering projection (B) has been carried out, enters registration openings (45) of another part of the dust aspirator, a closure of the dust aspirator (1) being possible only when the registration projections are inserted. 8. Dust aspirator according to claim 7, characterized in that the registration projections are formed on a plate (21) fixedly connected with the operating projection (B). 9. Dust vacuum cleaner according to one of claims 7 or 8, characterized in that the maneuvering projection (B / 120) has a lateral support intended to rest on a frame of the housing (118). 10. Dust vacuum cleaner according to claim 9, characterized in that the housing (118) forms a sliding path (128) on which the support can slide in the course of a closing process. 11. Dust vacuum according to one of claims 5 to 10, characterized in that the maneuvering projection (120) is attached to the draggable cover such that, in the course of an elastic contraction of the maneuvering projection (120), it can at the same time a tilt of said maneuvering projection (120) is initiated. 12. Dust aspirator according to claim 11, characterized in that the mooring is constituted by a soft bending means for bending. 13. Dust vacuum according to claim 12, characterized in that the mooring means is a belt.